>> word tonight from amtrak that service will be limited tomorrow between washington, new york, and boston. amtrak is telling passengers to make reservations by telephone or online to avoid sold-out trains and long lines at ticket counters. crews are still repairing damage caused by the storm last week. >>> a family trip turns into a tragedy after a toddler falls more than a dozen feet to his death at the zoo. >>> and the big walk in d.c. today to raise awareness for the number one cancer killer in the united states. >>> zoo officials in pittsburgh are promising a full investigation after a tragedy there this morning a. 3-year-old boy died after falling 13 feet into an exhibit of endangered wild dogs. the animals attacked him before keepers could get all of them away. the zoo says it's not sure if the boy died from the fall or attack. there were 11 dogs in the exhibit, one of them had to be killed. >>> few details tonight in a deadly shooting overnight in southeast d.c. someone called police around 2:15 this morning to report gunshots here. police found a 19-year-old man dead in a parking